Applescript On Error Handling
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of handling errors with try Statements and error Statements. It shows how to use a try statement to check for bad data and other errors, and an error statement to pass on any error that can’t be handled. It also shows applescript try error how to check for just a particular error number that you are interested in.Catching Errors applescript error catching in a HandlerThe SumIntegerList handler expects a list of integers. If any item in the passed list is not an integer, SumIntegerList applescript tutorial signals error number 750 and returns 0. The handler includes an error handler that displays a dialog if the error number is equal to 750; if the error number is not equal to 750, the handler resignals applescript do shell script error handling the error with an error statement so that other statements in the call chain can handle the unknown error. If no statement handles the error, AppleScript displays an error dialog and execution stops.on SumIntegerList from itemList try -- Initialize return value. set integerSum to 0 -- Before doing sum, check that all items in list are integers. if ((count items in itemList) is not equal to ¬ (count integers in itemList)) then -- If all
Applescript On Error Continue
items aren’t integers, signal an error. error number 750 end if -- Use a repeat statement to sum the integers in the list. repeat with currentItem in itemList set integerSum to integerSum + currentItem end repeat return integerSum -- Successful completion of handler. on error errStr number errorNumber -- If our own error number, warn about bad data. if the errorNumber is equal to 750 then display dialog "All items in the list must be integers." return integerSum -- Return the default value (0). else -- An unknown error occurred. Resignal, so the caller -- can handle it, or AppleScript can display the number. error errStr number errorNumber end if end tryend SumIntegerListThe SumIntegerList handler handles various error conditions. For example, the following call completes without error:set sumList to {1, 3, 5}set listTotal to SumIntegerList from sumList --result: 9The following call passes bad data—the list contains an item that isn’t an integer:set sumList to {1, 3, 5, "A"}set listTotal to SumIntegerList from sumListif listTotal is equal to 0 then -- the handler didn’t total the list; -- do something to handle the error (not shown)end ifThe SumIntegerList routine checks the list and signals an error 750 because the list contains at least one non-integer item. The routine’s error handler recognizes error number 750 and puts up a dialog to describe the
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Applescript Error Codes
with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the applescript error user canceled Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: applescript error 10810 Sign up AppleScript: on error (try) line number up vote 11 down vote favorite 2 Is it possible to get the line number, where the script threw an error? Example: try set a to "abc" + "123" on error line number https://developer.apple.com/library/content/documentation/AppleScript/Conceptual/AppleScriptLangGuide/reference/ASLR_error_xmpls.html num display dialog "Error on line number " & num end try applescript try-catch onerror share|improve this question asked May 12 '11 at 12:46 Tyilo 11.2k1863139 add a comment| 4 Answers 4 active oldest votes up vote 18 down vote accepted i don't think so try statements look like this try set a to "abc" + "123" on error errMsg display dialog "ERROR: " & errMsg end try but you could look at script debugger which will show you what line your error http://stackoverflow.com/questions/5978199/applescript-on-error-try-line-number occurred on another alternative is to get textmate which goes for $52 when it errors it gives you the line number and is also useful for writing code in many languages share|improve this answer edited Apr 10 '13 at 15:07 answered May 12 '11 at 15:39 mcgrailm 11.2k1554109 2 $199 for an apple script debugger, no thanks. +1 for pointing it out, though. –Adam Eberlin Apr 10 '13 at 0:49 @AdamEberlin see my new edit –mcgrailm Apr 10 '13 at 15:07 why the down vote or removal of vote not sure which , but noticed i went down 10 points –mcgrailm Jun 15 '13 at 16:11 wasn't me.. o.O –Adam Eberlin Jul 10 '13 at 22:02 add a comment| up vote 2 down vote Satimage's Smile is of great help when it comes to debugging an applescript. And it's free. Plus it's French (hehe). Definitely a great tool ! share|improve this answer answered Apr 19 '13 at 11:03 Zitoun 1265 add a comment| up vote 0 down vote Actually the on error syntax include the error number also (but no line number): try set a to "abc" + "123" on error errorMessage number errorNumber log ("errorMessage: " & errorMessage & ", errorNumber: " & errorNumber) end try You can use semaphores to mark your progress: try ... your code here ... set lineNumber to "17" ... more code here set lineNumber to "18" ... more code here on err
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business http://apple.stackexchange.com/questions/85682/what-techniques-work-to-handle-errors-in-applescript-so-i-can-place-a-dialog Learn more about hiring developers or posting ads with us Ask Different Questions Tags Users Badges Unanswered Ask Question _ Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top What techniques work to handle errors in AppleScript so script error I can place a dialog? up vote 2 down vote favorite I'm new to programming and AppleScript and I have lots of problems with error handling. Could anybody share their error handling for file operations like move/trash files? Here is my code so far: try tell application "Finder" to open file file_path on error e number n if e contains "Can’t get file" then say "mount external drive" --file not found, maybe this hard drive is applescript on error not mounted if e is x then something end try osx applescript error share|improve this question edited Mar 16 '13 at 14:44 bmike♦ 115k38202438 asked Mar 16 '13 at 13:59 pineapple89 1112 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote In general it's advisable to handle errors based on the error number and not on the text (which is language dependent and much more difficult to handle than some numbers). In addition start with just displaying the error number/messages to understand what really went wrong: try tell application "Finder" to open file file_path on error error_message number error_number display dialog "Error: " & the error_number & ": " & the error_message buttons {"OK"} default button 1 end try Once you know the potential error codes you want to handle specifically you can extend this to try tell application "Finder" to open file file_path on error error_message number error_number if error_number = -1728 then display dialog "Can't read file." else display dialog "Error: " & the error_number & ": " & the error_message buttons {"OK"} default button 1 end if end try share|improve this answer answered Mar 16 '13 at 14:32 patrix♦ 34.6k1072102 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Pos